Difficult Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 26: Two Difficult (DiffLev 13) Farsightedly Puzzles (numbers 131-132) 
 
-  Step-by-step instructions for solving  Puzzle 131, (89/144)   Diff: 13/9.9898.7356.7571
 -  Step-by-step instructions for solving  Puzzle 132, (93/144)   Diff: 13/8.8314.5999.9944